I need some help on a development problem. Scope: Provide an open source Rails based web calendaring component which allows for online users to work on their calendars, while also allowing users of groupware clients (Evolution/Sunbird/Outlook) to share their calendars online including the ability to view busy/free status and schedule invites, etc. I realize that there are a number of open source groupware systems out there right now (Kolab, Open-x-change, Hula), but honestly we don''t want the extra bloat. Also, we do not want to have to set up a separate daemon/server for each domain instance, since that just does not scale. We just want the calendaring functionality. The email can easily be pushed out through a standard MTA. Naturally WebDav would be the easiest short term solution, but ruby does not possess an implementation aside from running the WEBrick server, which doesn''t work for our solution since we want to push the software out through apache/fastcgi. I have looked at icalendar (http://rubyforge.org/projects/icalendar) and vpim (http://rubyforge.org/projects/vpim/). Both seem workable, however there still remains the problem of syncing client applications with the ical files created with these implementations. Any ideas? Thank you for your insights, Dave. -- ~~~~~~~~~~~~~~~~~~~ D''Andrew Thompson http://dathompson.blogspot.com